A sample of a material of 200 times 200 mm is located on an plain plate. Whereupon comes a steel plate, which must weigh 8 kg with all measuring sensors. This arrangement becomes now lively with an oscillator-active, whereby the brought in strength must be constant between 0,1 and 0,8 N.

The excitation takes place with a sine signal with changeable suggestion frequency. By means of an acceleration adaptor the resonant frequency is determined with the smallest possible energizing strength.

The measuring software controls the entire system, regulates the feeding strength and measures the resonant frequency. A report generator is likewise into the program integrated. Thus it is not a problem to configure the necessary logs and create concomitantly customized report.